20-a=5+4a

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Solution for 20-a=5+4a equation: 



20-a=5+4a

We move all terms to the left:

20-a-(5+4a)=0

We add all the numbers together, and all the variables

-a-(4a+5)+20=0

We add all the numbers together, and all the variables

-1a-(4a+5)+20=0

We get rid of parentheses

-1a-4a-5+20=0

We add all the numbers together, and all the variables

-5a+15=0

We move all terms containing a to the left, all other terms to the right

-5a=-15

a=-15/-5

a=+3

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